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Dessert

Caramel Filling for Cake

A sweet caramel filling made from brown sugar, butter, cream, milk, and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓

Caramel Filling for Cake

Ingredients

Directions

Make the caramel

  1. Combine brown sugar, butter, cream, and milk in a saucepan.

  2. Boil the mixture until it thickens and forms a soft ball in cold water.

Finish the filling

  1. Remove from heat and beat until smooth and cool.

  2. Add vanilla and mix well.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Milk + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

  2. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  3. Butter + creamtop 8% of all pairs
    Smell alikemoderate
    Cooked together41,516 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

  4. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

    Shared aroma: beta-damascenone (apple, rose).

  5. Sugar + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 recipes: they work on texture and structure more than aroma.

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Brown sugar
Provides the sweetness and caramel flavor, and its moisture helps set the texture as it cooks.
Butter
Adds fat for richness and a smooth, creamy mouthfeel in the filling.
Cream
Adds fat and richness, helping the filling turn smooth and thick.
Milk
Adds liquid and milk solids that brown and deepen the caramel flavor during boiling.

The step that matters

Boiling to the soft ball stage. The sugar concentration rises as water boils off, which sets the final texture. Boiling too short leaves a runny filling, while boiling too long makes it hard and grainy as it cools.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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